Xavernah is an atmospheric melodic black/death metal project from Rhenen, Netherlands, formed in 2025. Their debut album "Absence" (February 2025) spans 44 minutes of cosmic desolation and existential decay, blending crushing riffs with sweeping orchestration and even incorporating poetry by Percy Bysshe Shelley.

Xenolith is an industrial black metal project from Baldock, England, formed in 2009. Their releases including "Obscure Reflections" blend the harsh atmospherics of black metal with cold, mechanical industrial elements, creating a uniquely abrasive and dystopian sound.

Xerbittert is an ambient/black metal project from Moscow, Russia, formed in 2025. They merge atmospheric ambient textures with black metal intensity, exploring the intersection of beauty and harshness in the Russian extreme metal underground.

Xhief is a French black metal and ambient project, active since 2021 and shrouded in deliberate obscurity. Their releases "Nach dem Tod" and "Grief" channel introspective darkness through raw black metal paired with atmospheric ambient passages.

Xostroth is a black metal project from Kazanlak, Bulgaria, formed in 2007. The project channels the raw and atmospheric side of black metal, contributing to Bulgaria's small but dedicated extreme metal underground.

Xothox is a raw minimalist instrumental black metal solo project from Sweden, formed in 2022. The project, credited simply to "x," creates stripped-down, atmospheric black metal compositions built entirely on guitar, as showcased on their 2022 demo "Celestial Entrancement."

XXII Arcana is an avant-garde black metal project from Bologna, Italy, formed in 2020 with an ambitious concept of setting all 22 Major Arcana of the Tarot of Marseille to music. Their debut album "Atto Primo: 0 - IIII" covers the first five arcana, inspired by Jodorowsky's philosophy of psychomagic, with the project planned across five complete acts.

XXIV-XII is a black metal band from Presov, Slovakia, formed in 2016 with a philosophical focus on following one's true self through the left-hand path. Their "True Way" EP, recorded during the winter solstice of 2013 and released in 2016, channels raw black metal infused with themes of satanism, nature worship, and personal authenticity.

Xylia is a solo depressive black metal (DSBM) project from the United Kingdom, started in 2024. The project channels melancholic and atmospheric compositions through releases like "Ritualistic Suicide" and "Permafrost," embracing the raw isolation and emotional extremity characteristic of the DSBM subgenre.